[PERFORMANCE ISSUE] Jayce- Game briefly freezes/lags when transforming into hammer/melee form.

On Jayce, when you use his R to switch into his melee/hammer form, the game briefly freezes. This freeze does not happen on any of his other abilities, nor does it happen when switching into canon/range form.

I have tried other transforming champions like Elise and Nidalee and this did not occur.

I also adjusted my graphics to the lowest settings possible, closed every running program except the client, and it still did not fix the issue.

This has only been a recent occurence, I would say since patch 6.3 came out. Before that, I had absolutely zero problems with Jayce. I believed this was perhaps a problem on my end, but as I said, there is enough threads made in the past that demonstrate this is a specific problem; too specific to be a connection issue on the end of the user.

It does not affect all players using Jayce, but i've done enough research to conclude that this HAS been an issue with Jayce in the past before.